Optical imaging system, image capturing module and electronic device

Abstract

The invention provides an optical imaging system, an image capturing module and an electronic device. The optical imaging system comprises a first lens element with positive refractive power, a secondlens element with refractive power, a third lens element with positive refractive power, a fourth lens element with refractive power, a fifth lens element with positive refractive power, and a sixthlens element with negative refractive power, the object-side surface of the sixth lens element being convex in a paraxial region and the image-side surface being convex in a paraxial region, and at least one of the object-side surface and the image-side surface of the sixth lens element being provided with at least one inflection point; the optical imaging system meets the relational expression: 3.9 / mm < (IND2+IND3+IND4+IND5+IND6) / SD1 < 7.0 / mm, wherein IND2 to IND6 are the refractive indexes from the second lens element to the sixth lens element respectively, and SD1 is the vertical distance from the optical effective diameter position of the object-side surface of the first lens element to the optical axis. According to the optical imaging system, the plurality of lens elements with low refractive indexes are matched, a wide-angle function can be realized, the cost is saved, the thickness of the optical imaging system is relatively small by reasonably configuring the refractive powerof each lens element, and high-pixel and high-quality imaging is supported.

Description

technical field [0001] The invention relates to optical imaging technology, in particular to an optical imaging system, an imaging module and an electronic device. Background technique [0002] At present, with the development of science and technology, smart electronic devices are becoming popular in people's daily life, especially electronic devices with diversified camera functions, such as smart terminals with wide-angle camera functions. Most of the front wide angles of existing electronic devices are less than 84°, and the size of the captured object space is quite different from the viewing angle of the human eye, so the daily use scenarios are limited. [0003] Wide-angle optical lenses have a better sense of scene substitution and are more widely used. However, in the process of implementing this application, the inventors found that there are at least the following problems in the prior art: wide-angle optical lenses are generally thick, which does not meet the req...

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Problems solved by technology

[0003] Wide-angle optical lenses have a better sense of scene substitution and are more widely used. However, in the process of implementing this application, the inventors found that there are at least the following problems in the prior art: wide-angle optical lenses are generally thick, which does not meet the requirements of light and thin electronic equipment. In order to achieve the wide-angle function of the optical lens, most of the lenses are made of high refractive index materials, which increases the cost of the optical lens

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